Insulated Copper Tube for refrigeration is used for supply of hot and cold tap water, and as refrigerant line in HVAC systems. Our copper tube has a feature of clean surface,bright finish,even structure,high precision size,welding easily, good shaping.The executive standard of the pancake coil is GB/T17791-2007,ASTMB280,JIS H3300.The executive standard of Straight Copper Pipe is GB/T 17791-2007,ASTM B280,JIS H3300,ASTMB88.Welding point: no pores,cracks,slag,burrs and burn,not fusion,no obvious oxide film,no plug hole without significantly reduced(Φ6.3hole is larger than 3.0mm);Air tightness: using a high pressure for 4.0MPa pressure for 5 minutes, no leakage; Pressure: after the air tightness check is qualified, slowly press the pressure to 13MPa,keep for 1 minute, without any cracks ;Bending: The sample is bent into a curved core diameter of 2 times than the nominal diameter of the pipe, after bending 180 degrees, the pipe does not produce wrinkles and cracks; Tensile strength: The tensile strength is at 65-118mpa, the pull part is on the side of the aluminum pipe, and the weld is above 10mm; KTG: Shrink good, sealed accessories have been melted, completely wrapped in copper aluminum joints, the seal can not turn.
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